.flexBox {
  display: -webkit-box;
  /* 老版本语法: Safari, iOS, Android browser, older WebKit browsers. */
  display: -moz-box;
  /* 老版本语法: Firefox (buggy) */
  display: -ms-flexbox;
  /* 混合版本语法: IE 10 */
  display: -webkit-flex;
  /* 新版本语法: Chrome 21+ */
  display: flex;
}

.flex1 {
  -webkit-box-flex: 1;/* OLD - iOS 6-, Safari 3.1-6 */
  -moz-box-flex: 1;
  /* OLD - Firefox 19- */
  -webkit-flex: 1;
  /* Chrome */
  -ms-flex: 1; /* IE 10 */
  flex: 1;
}

.flexDirectionColumn {
  /* NEW, Spec - Opera 12.1, Firefox 20+ */
  -webkit-flex-direction: column;
  -moz-flex-direction: column;
  -ms-flex-direction: column;
  -o-flex-direction: column;
  flex-direction: column;
}

.alignItemCenter {
  -webkit-align-items: center;
  -moz-align-items: center;
  -ms-align-items: center;
  -o-align-items: center;
  align-items: center;
}

.alignItemFlexEnd {
  -webkit-align-items: flex-end;
  -moz-align-items: flex-end;
  -ms-align-items: flex-end;
  -o-align-items: flex-end;
  align-items: flex-end;
}

.justifyContentCenter {
  -webkit-justify-content: center;
  -moz-justify-content: center;
  -ms-justify-content: center;
  -o-justify-content: center;
  justify-content: center;
}

.justifyContentSpaceAround {
  -webkit-justify-content: space-around;
  -moz-justify-content: space-around;
  -ms-justify-content: space-around;
  -o-justify-content: space-around;
  justify-content: space-around;
}

.justifyContentFlexEnd {
  -webkit-justify-content: flex-end;
  -moz-justify-content: flex-end;
  -ms-justify-content: flex-end;
  -o-justify-content: flex-end;
  justify-content: flex-end;
}
.hide{
  display: none;
}
.w {
  width: 90%;
  margin: 0 auto;
}
.w2 {
  width: 95%;
  margin: 0 auto;
}
html, body {

  letter-spacing: 1px;
 }
html,body{-webkit-text-size-adjust:100%;-webkit-tap-highlight-color:rgba(0, 0, 0, 0);}
span {-webkit-tap-highlight-color: rgba(0, 0, 0, 0);}